amicus

noun

ami·​cus ə-ˈmē-kəs  -ˈmī- 

plural amici ə-ˈmē-ˌkē 

-ˈmī-ˌsī

: amicus curiae

Examples of amicus in a Sentence

Recent Examples on the Web

Over the last year, the Labor Department has filed amicus briefs — friend-of-the-court filings that lay out legal arguments for judges — in several class-action lawsuits on the side of the defendant company. — Paul Kiel, ProPublica, 8 July 2026

Michigan's environmental regulator, the Department of Environment, Great Lakes and Energy, has filed an amicus brief in the case supporting the regulations. — Keith Matheny, Freep.com, 3 July 2026

Most of our work is technical research papers, comment letters, amicus briefs, and the like. — Tax Notes Staff, Forbes.com, 30 June 2026

In January 2026, California Attorney General Rob Bonta signed a multistate amicus brief urging the Supreme Court to uphold state authority over mail-in ballot receipt deadlines. — Sofia Williams, Sacbee.com, 29 June 2026

Word History

First Known Use

1916, in the meaning defined above

Phrases Containing amicus

• amicus curiae

Legal Definition

amicus

noun

ami·​cus ə-ˈmē-kəs, -ˈmī- 

plural amici -ˈmē-ˌkē, -ˈmī-ˌsī 

: amicus curiae